Every time I open any printer queue I get a kernel panic and have to reboot. It's quite frustrating. I've tried removing/adding printers, clearing all caches with Onyx, repairing permissions, all manner of things to no avail.

Hey, a ProTip! Thanks for that. I didn't know about that function at all! Why does Apple do that? Some subtle dark-gray text at the bottom of the window letting me know that was an option would have been cool. Unfortunately that didn't fix it. I reset the printing system, re-added a printer, clicked the Open Printer Queue button and immediately got the darkened kernel panic screen. Thanks, though!
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GrayAug 27 '09 at 18:32

Do not open a printer queue; Open the printers preference pane in the system preferences and remove all of your printers. Log out, log in, and add the printers you want, be sure to to use only new drivers. I had an issue like this with my HP 2600n after upgrading from Leopard to Snow Leopard. I needed to remove the printer, download the new driver from HP (which doesn't support half of what the old driver did) and reinstall the printer.